release: draft release for v0.2.4-alpha.1

[randyahx]

Description

This release includes 4 features, 9 bugfixes and 2 documentation updates.

Rationale

Features:

• #374 feat: group member expiration
• #390 feat: add flag to enable/disable heavy queries and refactor apis
• #399 feat: add new query APIs for group and group member
• #403 feat: sp maintenance mode

Bugfixes:

• #377 fix: improve e2e tests to include more coverage from server side
• #379 fix: error member name in transferInRefundPackageType
• #383 fix: fix lock balance not updated for frozen payment account
• #385 fix: fix returned operation type in group cross chain app
• #391 fix: add cancel mb event for discontinue and delete
• #398 fix: register gov cross-chain app
• #400 fix: allow edit-sp by cmd without blskey
• #401 fix: add group existence check when verify permission
• #375 fix: fix defining err for ErrInvalidBlsPubKey

Chores:

• #376 chore: add unit tests for the storage module
• #378 chore: add unit test cases for challenge module
• #380 chore: add unit test cases for payment module
• #381 chore: add tests for bridge module
• #387 chore: add more e2e test cases for payment module
• #388 chore: add cli tests
• #389 chore: add more test cases for cross chain apps

Documentation:

• #402 docs: update testnet asset to v0.2.3
• #404 docs: update document site link

Example

Please refer to the PRs for detailed information.

Changes

Notable changes:
none